Dinan D660-0086-BLK Free Flow Axle-Back Exhaust for 2020-2025 BMW X3M/X4M

The Dinan Free Flow Axle-Back Exhaust system delivers enhanced performance and an aggressive exhaust note for the 2020-2025 BMW X3M and X4M. Engineered with precision, this exhaust system increases power output by 8 horsepower at 6600 RPM and adds 6 ft-lbs of torque at 6600 RPM while reducing weight by 5 pounds compared to the factory system.

Key Features:

• Larger 76mm diameter piping versus factory 70mm for significantly improved exhaust flow
• Premium 304 brushed stainless steel construction with TIG welding for exceptional durability
• Twin 76mm exhaust valves—30% less restrictive than OEM valves for maximum flow
• Quad 4.5-inch (114mm) double-walled exhaust tips with black ceramic coating and laser engraving
• Computer-controlled exhaust valves retained for quiet operation during low-speed driving and full opening under high-load conditions
• Tuck-it tip design maintains a clean, factory appearance without visual obstruction
• Bolt-on installation with all necessary mounting hardware included
• Sportier, more aggressive exhaust tone without excessive drone

This axle-back exhaust system is designed specifically for the S58 engine platform in the F97 X3M and F98 X4M models. The computer-controlled valve system ensures versatility—enjoy a refined sound during casual driving while unleashing the full performance exhaust note when you demand it.